Strainer-rod for wood-saws



Nn. 607,70. Patenied July I9, i898. W. SMlTH & E. F. SHAW.

STRAINER ROD FOR WUOD SAWS.

(Application tiled July 14, 1897.)

No Modeln UNITED Tarts i ArtNr rines.

WILLIAM SMITH AND EDVIN F. SIIAIUOF PHILADELPHIA, PENNSYLVANIA, ASSIGNORS TO TI-IE HENRY DISSTON da SONS, INCORPORATED, OF SAME PLACE.

sTRAlNl-:R-R'oD-'FR wooD-sAws.

SPECIFICATION forming part of Letters Patent No. 607,712, dated duly 19, 1898.

Application fina my 14, 1897. serial No. 644,513. (no man.)

To all whom, it Indy concern.-

Be it known that we, WILLIAM SMITH and EDWIN F. SHAW, citizens of the United States, and residents of Philadelphia, Pennsylvania, have invented certain Improvements in Strainer-Rods for Wood-Saws, dac., of which the following is a specification.

The object of our invention is to construct a strainer-rod for wood-saws Which will with# 1o stand the strains to which it is subjected and which can be readily and cheaply manufactured.

In the accompanying drawings, Figure l is a side view of a wood-saw, illustrating our invention. Fig. 2 is a plan view of the strainerrod detached. Fig. 3 is a view of one end of the blank after being liattened. Fig. 4. is a view of one end of the blank after being bent to form the loop. Fig. 5 is a viewl showing zo the bent loop and the sleeve in position. Fig. 6 is a section on the line 6 6, Fig. 5; and Figs. 7, 8, 9, and lO are views of modifications of the invention.

Referring to the drawings, A is an ordinary z5 wood-saw commonly used for sawing cordwood. Y

a a are the end bars, and d the cross-bar, forming the frame.

a2 is the saw-blade, and B is the strainer- 3o rod, to which our invention especially relates, it being understood, however, that the strainer-bar can be used on other saws and in other places without departing from our invention.

Heretofore it has been a difiicult matter to obtain a strainer-rod which would withstand the strains to which it is subjected without making a cumbersome and expensive article. By our invention, however, we have reduced 4o the cost of manufacture considerably and at the same time making a very substantial and neat rod.

b l) are the two sections of the rod, having screw-threads at their abutting ends, and

4 5 these two sections are united by a turnbuckle c of the usual construction. The loops b on each Vrod are adapted to pass over the end bars a ct of the frame and rest in notches therein. The blank for these rods is made of 5o iron orlow-steel wire cut to the proper length, and the portion .fr is passed through suitable rolls or dies, having one of the rolls or dies liat and the other concaved, so as to form the blank with one side straight and the other side curved, as shown in the cross-section, Fig. 6, in order that it may adapt itself more readily to the flat sides of the saw-frame. At the same time that the blank is flattened the rolls or dies also form a projection at b2 and a recess at b3, so that when the lflattened portion x is bent in the form of a loop, as shown in Fig. 4, the projection Willenter the recess, so as to lock the parts against longitudinal movement when the sleeve d, which is simply a piece of tubing cut to the proper length, is slipped over the end, as shown in Fig. 5.

In order to secure the sleeve in a fixed position" at theV joint, we compress the sleeve upon the rod by a suitable press, so that it will be impossible to remove the sleeve after being once set in position without Iirst de# stroying it. The sleeve forms a positive lock, so as to prevent the end which forms the loop from pulling out when the rod is strained.

In some instances the sleeve may be simply driven on instead of slipped on and compressed without departing from the main feature of the invention.

The notch and projection may be dispensed with, and as a substitute therefor the free end of the blank may be turned up at the back of the sleeve, as shown in Fig. 7, or the rod may be perforated, as shown in Fig. 8, and the end of the rod may be turned so as to enter the perforation, as shown in Fig. 8, or the blank may be formed as shown in Fig. 9, in which case a two-part sleeve may be passed over and secured in position either by lpressing or by rivets, and in some instances a groove may be formed on each side of the joints, as shown in Fig. lO, and the sleeve slipped over the joint and its ends turned down `into the grooves, preventing the sleeve moving longitudinally and also locking the end of the blank in position.

The free end of the loop may be secured to the rod by Welding, brazing, or riveting, with or without the sleeve; but we prefer the IOO flattened end, said end being bent to forrn a loop, with the flattened portion on the inside, the other end of the loop being bent and resting against the rod, With a sleeve confining the free end of the loop to the rod, and means for preventing the free end of the loop being drawn out of the sleeve, substantially as described.

2. The combination in av strainer-rod for Wood-saws, of a rod having a reduced and flattened end, the end being bent so as to form a loop with the flattened portion on the inside, a projection on one portion of the rod and a recess in the other so that the projection Will t in the recess when the rod is bent, With a sleeve conning the free end. to the rod and the projection Within the recess, substantially as described.

8. The combination in a strainer-rod for Wood-saws, of a round rod. reduced at one end zo so as to forni a flattened surface on the inside, a loop formed by bending the Iiattened end of the rod some distance away from the round portion leaving a fiat section against which the free flattened end of the rod is 25 clamped, a projection on one part entering the recess on the other part, with a connin gsleeve, substantially as described.

In testimony whereof We have signed our names to this specication in the presence of 3o 

